INTRODUCTION Introduction FEATURES Features GOLD PLATED TERMINALS: Thank you for purchasing this Cadence United Series amplifier. Over the years, the technology used to create audio amplifiers has grown by leaps and bounds. We have tens of thousands of satisfied customers still using our first generation Ultra Drive amplifiers which are more than 16 years old. Our competition is satisfied with just continuing to build the same units year after year without thought for improvement, but not Cadence.
Features “ARVA”- AUTOMATIC RAIL VOLTAGE ADJUSTMENT CIRCUITRY: Cadence United Series amplifiers feature “ARVA” circuitry in their power supply. This circuit constantly monitors the output stage and under high current demands will adjust the power supply rail voltages so that enough power is available for peak situations. The “ARVA” also improves the damping factor of the amplifier when playing low impedance mono loads.
Installation Basics ADJUSTING THE SYSTEM Once the system is operational, the first thing to do, is set all crossover points to approximate settings. In the case of the basic sub woofer system Low Pass filter crossover at 100 Hz or so. Set the Bass Boost equalizer controls to 0 dB ( Flat Switch Position.) USING THE ELECTRONIC CROSSOVER - 4 CHANNEL MODELS (VEGAS + CHICAGO) The four channel models feature separate crossovers for channels 1-2 and 3-4.
4 Channel Amp with 2 Channel Input If your head unit has only one pair of Left and Right RCA out put jacks, plug them in to RCA input Jacks 1 and 2 of the amplifier and set the Input model switch to the 2CH position. The amplifier preamp circuit will automatically mix the signals to channels 3 and 4 thereby preserving your Left and Right Balance control but with no Fade control Front to Rear.
Basic 4 Channel Configuration 4 Channel Amplifier Bridged to 2 Channels CH 1-2 CROSSOVER MODE SWITCH IN LOW PASS POSITION FRONT SPEAKERS CROSSOVER MODES SWITCH IN FULL RANGE POSITION REMOTE SUBWOOFER LEVEL CONTROL LEFT SPEAKER 2-4 OHM RIGHT SPEAKER 2-4 OHM When bridging the four channel amplifier, make sure that your final woofer impedance on each bridged channel is no lower than 4 ohms.
4 Channel Amplifier in 3 Channel Mode Channels 1 and 2 should be wired to speakers no lower than 2 ohm loads per channel in stereo. Channel 3 and 4 should be bridged as per the diagram wiring the woofer to Channel 3 positive side (+) and Channel 4 negative side ( – ) terminals.
4 Channel with Dual Mixed Mono Configuration ALL CROSSOVER SETTINGS IN THIS MODE SHOULD BE SET TO FULL RANGE. SUBWOOFER MINIMUM IMPEDANCE 4-8 OHMS LOW PASS FILTER INDUCTOR FRONT SPEAKERS RIGHT SPEAKER 4 OHM LEFT SPEAKER 4 OHM Boston 5 Channel Input Mode If your head unit has one single pair of RCA outputs, input them in to the amplifiers Channel 1 and 2 input jacks and set the Input Mode Switch to 2Ch.
Boston 5 Channel Amplifier Speaker Wiring Mono Block 2 Ohm Amplifiers COMPONENT SPEAKERS MINIMUM IMPEDANCE 2-4 OHMS Minimum impedance for channels 1 through 4 is 2 ohm stereo. Channel five minimum impedance is 2 ohm mono capable. 2 OHM MINIMUM LOAD Phoenix SUBWOOFER MINIMUM IMPEDANCE 2-4 OHMS 4 OHM SUBWOOFER INPUT MODE SET TO 5 CHANNEL - OR - 4 OHM SUBWOOFER Phoenix is a 2 ohm mono block amplifier.
Class D Mono Block 1 Ohm Amplifier Dakota / Olympia Speaker Configuration Dakota / Olympia 1 OHM MINIMUM LOAD Vegas The Dakota and Olympia are 1 ohm stable mono block amplifiers. They feature RCA pre amp line outputs for feeding of a full range signal to a secondary full range amplifier in a multi-amp system. 18 2 OHM SUBWOOFER - OR - 2 OHM SUBWOOFER DVC 4 OHM SUBWOOFER IN PARELLEL =1 OHM LOAD The Dakota and Olympia are 1 ohm mono block Class D amplifiers.
Twin Amplifier Bridging Twin Amplifier Bridging You can only bridge 2 of the same amplifiers together. DO NOT bridge different models together. MASTER The Dakota or Olympia can be bridged together for double the power output into a 2-ohm load. Though each amp is 1 ohm stable, when bridging amplifiers, you must bridge them to a 2 ohm load. Input the head unit signal into the MASTER amplifier and set the Bridged Mode switch to Master.
Twin Amplifier Bridging Twin Amplifier Bridging OLYMPIA / DAKOTA SUBWOOFER MINIMUM IMPEDANCE 2 OHMS Once again, when bridging two amplifiers together, the final impedance load of the bridged amplifiers should be no lower than 2-ohms. Double power will occur at 2-ohms. Master amplifiers positive (+) speaker terminal should be wired to the positive terminal of the subwoofer. Slave amplifiers positive (+) speaker terminal should be wired to negative terminal of the subwoofer.
Specifications Specifications Boston Chicago Vegas Olympia Dakota Phoenix • Rated Power: 75 Watts RMS @ 4 ohm x 4 • Rated Power: 90 Watts RMS @ 4 ohm • Rated Power: 135 Watts RMS @ 4 ohm • Rated Power: 2000 Watts RMS @ 1 ohm • Rated Power: 1200 Watts RMS @ 1 ohm • Rated Power: 1200 Watts RMS @ 2 ohm • Rated Power: 100 Watts RMS @ 2 ohm x 2 • Rated Power: 140 Watts RMS @ 2 ohm • Rated Power: 225 Watts RMS @ 2 ohm • Rated Power: 1000 Watts RMS @ 2 ohm • Rated Power: 600 Watts RMS @ 2 ohm •
Speaker Wiring Chart Speaker Wiring Chart SERIES: DUAL VOICE COIL SPEAKERS 4 X DUAL VC 8 OHM SPEAKERS WITH SERIES VOICE COILS, ALL IN PARALLEL 4+4 OHM 4+4 OHM 4+4 OHM PARALLEL: DUAL VOICE COIL SPEAKERS 4+4 OHM 2 OHM TO AMPLIFIER 8 OHM TO AMPLIFIER Please note that the minimum impedance load for single Cadence United Amplifiers is 2 ohm stereo and 4 ohm mono bridged. 4+4 OHM 4+4 OHM 2 OHM TO AMPLIFIER Lower impedance loads will cause overheating and may damage the amplifiers.
Due to constant product improvements, these specifications are subject to change without notice. Though we tried our best to insure that this manual is free and clear of errors please don’t hold us responsible for printing errors. Copyright by Cadence Acoustics LTD.
